Profile: Mallard Control Company, Inc is a supplier of measurement and control solutions to the oil & gas industry. Our products include control valves, regulators, relief valves, controllers, switches and gauges. Our model 3200 liquid level controller is ideal for oilfield scrubber and separator applications where level control is required. Our Model 5500 control valve is used over a broad range of pressure drops and temperatures where accurate and reliable control is required.